The second book in the thrilling middle grade mystery series, perfect for fans of Robin Steven's Murder Most Unladylike. Set in eighteenth-century London, with all the fun and zest of Hamilton and inspired by real Black British historical figures. Agents of history. Partners in Mystery. Sisters in solving crime. Twelve-year-olds Lizzie Sancho and Dido Belle are from different worlds - Lizzie lives in Westminster in her dad's tea shop, while Belle is an heiress being brought up by her aunt and uncle at grand Kenwood House - but they both share a love of solving mysteries. And after saving Lizzie's father from attempted murder surely there is no threat too dangerous for the detective duo? It's the summer of 1777, the night of the grand unveiling of the Sancho-Mansfields family portrait - a groundbreaking step towards representing friendship, family, and freedom. But soon enough things take a chaotic turn - the painting has been stolen! This theft is only the start, revealing a much bigger, more terrifying secret that haunts the cobbled streets of London. A conspiracy is underway, one that has links to the kidnapping of Lizzie's friend Mercury, and leads all the way to a series of attempted poisonings, all at the hands of an ominous organisation pulling the strings from the shadows. These villains lurk everywhere, even in the very homes they call safe. And their desire for power is only growing. When anyone could be involved in this Brotherhood of Masters, who can Lizzie and Belle trust? Once again it is up to the two girls to unveil the truth and put an end to the corruption that plagues the city.